Everything about Dark Nebula totally explained
A
dark nebula is a type of
interstellar cloud that's so dense that it obscures the light from the background
emission or
reflection nebula (for example, the
Horsehead Nebula) or that it blocks out background stars (for example, the
Coalsack Nebula).
The
extinction of the light is caused by
interstellar dust grains located in the coldest, densest parts of larger
molecular clouds. Clusters and large complexes of dark nebulae are associated with Giant Molecular Clouds. Isolated small dark nebulae are called
Bok globules.
The form of such dark clouds is very irregular: they've no clearly defined outer boundaries and sometimes take on convoluted serpentine shapes. The largest dark nebulae are visible to the naked eye, appearing as dark patches against the brighter background of the
Milky Way.
In the inner regions of dark nebulae important events take place, such as the
formation of stars and
masers.
Further Information
Get more info on 'Dark Nebula'.
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